Article
Chemistry, Physical
Ping Wang, Yu-Jie Guo, Wan-Ping Chen, Hui Duan, Huan Ye, Hu-Rong Yao, Ya-Xia Yin, Fei-Fei Cao
Summary: A self-supported hard carbon electrode from fungus-pretreated basswood shows improved rate capability and cycling stability. The electrode demonstrates higher capacity retention and initial Coulombic efficiency compared to conventional hard carbon derived from basswood. The study also provides insights into the storage mechanism of hard carbon.
Article
Engineering, Environmental
Taijin Tang, Wenli Zhu, Pingping Lan, Xingxian Lan, Huarui Xie, Pei Kang Shen, Zhi Qun Tian
Summary: In this study, hard carbon materials with specific macro-micro structures were synthesized by treating Calvatia Gigantea (SCG) spores using a coupling strategy. The research results showed that the specific hollow hemi-spherical morphology of the hard carbon material exhibited outstanding Na+ storage performance, including high specific capacity, high initial Coulombic efficiency, high-rate capability, and cycling stability. Theoretical analysis revealed that constructing closed pores made of distorted graphite-like layers, along with proper lattice distance and curvature, is essential for improving Na+ storage capacity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Multidisciplinary
Kai-Yang Zhang, Yan-Qiu Fu, Han-Hao Liu, Jia-Lin Yang, Meng-Yuan Su, Yinglin Wang, Xing-Long Wu
Summary: This study demonstrates the synthesis of N-doped hard carbon material using peptone as a precursor through one-step annealing method. The prepared material exhibits excellent electrochemical performance, making it a promising candidate for sodium ion batteries.
Review
Biochemistry & Molecular Biology
Suchong Tan, Han Yang, Zhen Zhang, Xiangyu Xu, Yuanyuan Xu, Jian Zhou, Xinchi Zhou, Zhengdao Pan, Xingyou Rao, Yudong Gu, Zhoulu Wang, Yutong Wu, Xiang Liu, Yi Zhang
Summary: Compared to lithium metal, sodium resources on Earth are more abundant and evenly distributed, making sodium-ion batteries a potential replacement for lithium-ion batteries in large-scale energy storage systems. Hard carbon, among various anode materials, shows advantages and commercial potential for sodium-ion batteries. This review analyzes the adsorption behavior and discharge process of sodium ions on hard carbon, discusses the controversial storage mechanism, and summarizes four storage mechanisms. The relationships between morphology and structure regulation, heteroatom doping, and electrolyte optimization are further explored, as well as the electrochemical performance of hard carbon anodes. Sodium-ion batteries with hard carbon anodes are expected to have excellent electrochemical performance and lower costs for large-scale energy storage.
Article
Chemistry, Multidisciplinary
Nekane Nieto, Julien Porte, Damien Saurel, Lisa Djuandhi, Neeraj Sharma, Alexander Lopez-Urionabarrenechea, Veronica Palomares, Teofilo Rojo
Summary: Hard carbons are produced from waste biomass (spent coffee grounds, sunflower seed shells and rose stems) by two methods: direct pyrolysis and by combined hydrothermal carbonization and pyrolysis. Electrochemical performance of as-obtained hard carbons using hydrothermal carbonization combined with pyrolysis is improved with up to 76% ICE and 280 mAh g-1 at C/5.
Article
Chemistry, Physical
Usman Ghani, Nousheen Iqbal, Ahmed A. Aboalhassan, Bowen Liu, Tabish Aftab, Imran Zada, Farman Ullah, Jiajun Gu, Yao Li, Shenmin Zhu, Qinglei Liu
Summary: This work was supported by the National Natural Science Foundation of China and Shanghai Science and Technology Committee, and funded by the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials at Donghua University.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Review
Engineering, Chemical
Yanghao Jin, Ziyi Shi, Tong Han, Hanmin Yang, Habtom Desta Asfaw, Ritambhara Gond, Reza Younesi, Par G. Jonsson, Weihong Yang
Summary: This review focuses on the conversion of waste biomass to hard carbon (HC) and its application in sodium-ion batteries (SIBs). The relationship between the processing conditions of biomass and the resulting structure of the final HC product, as well as its electrochemical performance, was analyzed using data from various publications. The results suggest an optimal temperature range (around 1200 to 1400 degrees C) that enhances graphitic domain formation and reduces the formation of open pores, resulting in HC anodes with high storage capacity (>300 mAh/g) and high initial coulombic efficiency (ICE) (>80%).
Article
Chemistry, Physical
Zoya V. Bobyleva, Oleg A. Drozhzhin, Anastasia M. Alekseeva, Kirill A. Dosaev, Georgy S. Peters, Grigorii P. Lakienko, Tatiana I. Perfilyeva, Nikita A. Sobolev, Konstantin I. Maslakov, Serguei V. Savilov, Artem M. Abakumov, Evgeny V. Antipov
Summary: This study comprehensively explores the pretreatment of phenol-treated hard carbon anode materials and their impact on electrochemical performance. The results show that the conditions of the pretreatment step have a significant influence on the microstructure and electrochemical performance of the hard carbon.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Electrochemistry
Grigorii P. Lakienko, Zoya Bobyleva, Maria O. Apostolova, Yana Sultanova, Andrey K. Dyakonov, Maxim Zakharkin, Nikita A. Sobolev, Anastasia M. Alekseeva, Oleg A. Drozhzhin, Artem M. Abakumov, Evgeny Antipov
Summary: Sodium-ion battery technology is rapidly developing, and hard carbons derived from invasive plants such as Heracleum sosnowskyi show promising electrochemical performance as anode materials. This study successfully obtained hard carbons from giant hogweed and demonstrated their high discharge capacity, initial Coulombic efficiency, and capacity retention in sodium half-cells. The possibility of using giant hogweed-based hard carbons in real batteries was also demonstrated.
Article
Chemistry, Physical
Qingwei Meng, Binyi Chen, Wenbin Jian, Xiaoshan Zhang, Shirong Sun, Tiejun Wang, Wenli Zhang
Summary: This study reports the preparation of hard carbons with different pore structures by carbonizing different lignin precursors, and investigates the relationship between their microstructures and sodium-ion storage performance. Hard carbon prepared from corn cob lignin shows the highest closed pore volume, resulting in the highest plateau capacity. The formation of closed pores is attributed to the transformation of micropores at high carbonization temperatures. The study proposes a method for calculating the closed pore volume and finds a positive correlation between plateau capacity and closed pore volume.
JOURNAL OF POWER SOURCES
(2023)
Review
Chemistry, Multidisciplinary
Jiaqi Meng, Guofeng Jia, Hongjun Yang, Min Wang
Summary: This paper briefly summarizes the research progress of hard carbon anode surface solid electrolyte interface (SEI) in sodium-ion batteries in recent years. By controlling the formation of SEI, the efficiency of sodium-ion battery anodes can be improved, but the composition and evolution of SEI are still unclear.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Mei Chen, Yaping Cao, Cong Ma, Huai Yang
Summary: This paper presents a functional nitrogen, sulfur, and oxygen tri-doped hard carbon network as the anode material for potassium-ion batteries, delivering high potassiation capacity and cycling stability through its unique structure and properties.
Article
Materials Science, Coatings & Films
Chih-Chieh Wang, Wei-Lun Su
Summary: Hydrothermal (HHT) pretreatment significantly improves the microstructures, surface compositions, and electrochemical performances of hard carbons, resulting in higher initial coulombic efficiencies and discharge capacities. HHT-treated hard carbon materials exhibit higher discharge capacities and faster charging rates at high current densities.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Hayley S. Hirsh, Baharak Sayahpour, Ashley Shen, Weikang Li, Bingyu Lu, Enyue Zhao, Minghao Zhang, Ying Shirley Meng
Summary: Hard carbon is a promising anode material for grid-level sodium-ion batteries due to its high specific capacity and low working potential, but issues such as low first cycle efficiency and poor rate performance need to be addressed. Studies have shown that the solid electrolyte interphase (SEI) formed by ether-based electrolytes can significantly improve the performance of hard carbon anodes, highlighting a pathway to achieve long-life grid-level NIBs through interfacial engineering.
ENERGY STORAGE MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Huimin Zhang, Wenfeng Zhang, Fuqiang Huang
Summary: The coupled strategy for preparing hard carbon microspheres with a unique structure leads to high reversible specific capacity, high initial Coulombic efficiency, and excellent cycling stability in SIBs, comparable to commercial graphite in lithium-ion batteries. The tunable fabrication process and impressive performance make this strategy promising for practical applications in SIBs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Applied
Jinseok Park, Jeongmin Nam, Haesung Yun, Hyoung-Joon Jin, Hyo Won Kwak
Summary: In this study, a water-stable and mechanically robust fish-derived gelatin (FG) film was successfully prepared using alginate dialdehyde (ADA) as a crosslinking agent. The mechanical strength and Young's modulus of the FG/ADA composite film significantly increased with an increase in the content of ADA, with FG/ADA10 film showing stability under wet conditions. The crosslinking process with ADA not only improved the mechanical properties but also enhanced the antioxidative capacity of the FG/ADA edible film, suggesting potential practical applications in the edible film-based packaging industry.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Physical
Sun Jong Kim, Hyo Won Kwak, Sangwoo Kwon, Hyunho Jang, Su-il Park
Summary: Blend of PLA and PBSeT with the addition of HDI can improve the mechanical properties and hydrolysis resistance, with HDI-treated specimens exhibiting higher tensile strengths and elongations than the control group.
Article
Chemistry, Multidisciplinary
June-Ho Choi, Seong-Min Cho, Jong-Chan Kim, Sang-Woo Park, Young-Min Cho, Bonwook Koo, Hyo Won Kwak, In-Gyu Choi
Summary: The study found that extraction conditions significantly impact the structural characteristics of ethanol organosolv lignin, with different structural features exhibiting varying effects on thermal properties. Lignins with low molecular weight and high phenolic hydroxyl content showed excellent thermal properties.
Article
Electrochemistry
Jun Ryu, Saemon Yoon, Seojun Lee, Donggun Lee, Bhaskar Parida, Hyo Won Kwak, Dong-Won Kang
Summary: The conventional IPA rinsing step was found to cause the formation of an undesirable Cs4PbBr6 phase, while using ethanol as a rinsing solvent led to a pure-phase CsPbBr3 crystal with improved charge extraction properties. Experimental results showed that ethanol as a rinsing solvent significantly enhanced the performance of the perovskite solar cells and maintained stability.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Applied
Hyo Won Kwak, Jinseok Park, Haesung Yun, KyoungHwa Jeon, Dong-Won Kang
Summary: By adding sugars, gelatin nanofibers have increased stability against hydrolytic degradation, enhanced mechanical properties, and antioxidant functions.
FOOD HYDROCOLLOIDS
(2021)
Article
Materials Science, Characterization & Testing
Jeongmin Nam, Yujin Hyun, Subin Oh, Jinseok Park, Hyoung-Joon Jin, Hyo Won Kwak
Summary: The fabrication of a functionalized bacterial cellulose-derived nanocrystal on existing sericin films enhances their mechanical properties and develops ultraviolet-blocking, water-resistant, and antioxidant properties.
Article
Polymer Science
Junsik Bang, Hyunju Lee, Yemi Yang, Jung-Kwon Oh, Hyo Won Kwak
Summary: The focus on developing eco-friendly plastics and sustainable materials has led to a growing interest in high-strength and functional natural fiber-based composite materials. A fibrous composite with excellent mechanical properties was prepared by applying bamboo-derived nano and microfiber multiscale hybridization, improving its tensile strength and toughness. This eco-friendly nano/micro fibrous preform can be extensively utilized in the green plastic industry.
Article
Chemistry, Applied
YunJin Kim, Junsik Bang, Jungkyu Kim, June-Ho Choi, Sung-Wook Hwang, Hwanmyeong Yeo, In-Gyu Choi, Hyoung-Joon Jin, Hyo Won Kwak
Summary: Nanocellulose is gaining interest as an eco-friendly water treatment material due to its large specific surface area and abundant hydroxyl functional groups, but its dispersion state hampers practical usage. A regenerated cellulose hydrogel with cationic functional groups was developed to address the low performance of nanocellulose in removing anionic pollutants. The PEI surface cationization process improved mechanical rigidity and showed excellent Cr(VI) removal capacity, maintaining high efficiency after multiple reuses.
CARBOHYDRATE POLYMERS
(2022)
Article
Polymer Science
Munju Shin, Sejun Yang, Hyo Won Kwak, Ki Hoon Lee
Summary: Various natural materials, including silk sericin (SS), have been used for the synthesis of gold nanoparticles (AuNPs). In this study, AuNPs were successfully synthesized using SS, and optimal synthesis conditions were determined. The size of the AuNPs prepared under the optimal conditions was approximately 17 nm, and the particles were well dispersed.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Applied
Jungkyu Kim, Junsik Bang, YunJin Kim, Jong-Chan Kim, Sung-Wook Hwang, Hwanmyeong Yeo, In-Gyu Choi, Hyo Won Kwak
Summary: In this study, a facile and simple nanocellulose drying system was designed using lignin as an eco-friendly additive to overcome the agglomeration issue during the drying process. The addition of lignin minimized aggregation and ensured excellent redispersion kinetics and stability, with the added lignin being removable through a simple washing process.
CARBOHYDRATE POLYMERS
(2022)
Article
Engineering, Environmental
YunJin Kim, Jinseok Park, Junsik Bang, Jungkyu Kim, Hyoung-Joon Jin, Hyo Won Kwak
Summary: Nanocellulose has promising applications in water treatment due to its unique properties, such as renewability and large surface area; a study showed that carboxymethyl cellulose nanofibrils modified with polyethyleneimine had excellent Cr(VI) removal capacity and stability; the removal of Cr(VI) was achieved through a combination of electrostatic attraction, chemical reduction, and chelation mechanisms.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
YunJin Kim, Jinseok Park, Junsik Bang, Jungkyu Kim, Jong-Hwa Kim, Sung-Wook Hwang, Hwanmyeong Yeo, In-Gyu Choi, Hyo Won Kwak
Summary: The study explored the potential of lignin as an adsorption material for water restoration and dye removal. By crosslinking lignin fibers and utilizing a natural crosslinking agent, the lignin/PVA fibers exhibited excellent dye removal capacities. The desorption process was most efficient under low pH conditions, and the fibers maintained a 95% adsorption efficiency after five regeneration cycles.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Multidisciplinary Sciences
Jungkyu Kim, Subong Park, Junsik Bang, Hyoung-Joon Jin, Hyo Won Kwak
Summary: The development and utilization of biodegradable plastics is an effective solution to environmental pollution caused by non-degradable plastics. A biodegradable polymer called PBEAS, which has excellent strength and elongation, has been developed to replace non-degradable fishing nets. This eco-friendly fishing gear can prevent ghost fishing and potential microplastic leakage by collecting and composting the products after use.
Article
Polymer Science
Jungkyu Kim, Sangwoo Park, Seungoh Jung, Heecheol Yun, Kyusuk Choi, Gyeom Heo, Hyoung-Joon Jin, Subong Park, Hyo Won Kwak
Summary: This study evaluates the biodegradability of PBS fishing gear in marine sedimentary environments, aiming to address the issue of ghost fishing caused by discarded gear. Through biodegradation analysis, it is found that after 180 days, the PBS gear reduces to carbon dioxide by 27.3%. The remaining PBS shows bulk erosion and no changes in crystallinity and thermal properties. The degradation primarily occurs through surface abrasion and metabolic utilization of hydrolysis products by microorganisms.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Materials Science, Multidisciplinary
Subin Oh, Junsik Bang, Hyoung-Joon Jin, Hyo Won Kwak
Summary: Currently, the majority of oil-water separation membranes are made of fluorine-based polymers with low surface energy. However, these materials are non-biodegradable and require a large amount of organic and toxic solvents in the manufacturing process. Therefore, there is increasing interest in developing a new eco-friendly oil-water separation membrane that does not cause secondary pollution and exhibits selective wettability characteristics.
ADVANCED FIBER MATERIALS
(2023)
